Vacuum fuel-feeding device for internal-combustion engines and the like



l c. s. BURTON. VACUUM FUEL FEEDING DEVICE FOR INTERNAL COMBUSTION ENGINES AND THE LIKE.

I APPLICATION ILED MAH. 22, |922. 1,432,381

Patented Oct. 17, 1922..

wt wrm @ya @Mmwg/e L@ c Patented Oct: 17, 1922.

canino srniss o y incesti revenir clerics.

CHARLES S. `BURTO1AL 0F OAK PARK, ILLINOIS, ASSIGNOB TO STEWART-WARNER SPEEDOMETEE CORPORATION, OF CHICAGU, IJILIITIS.V A CORPORATION OF VIE- GDIIL VACUUM FUELFEEDING DEVICE FOB INTERNAL-OOMBUSTION ENGINES AND THE Iam. i

appunti inea maken se, me. sei-iai No; aises?.

To all whom it may concern:

Be it known that I, Cmiimis S. BUii'roN,

b a citizen of the United State, residing in Oak Park, in the county of ook and the State of illinois, have invented certain new and useful Improvements in Vacuum Fuel- Feeding Devices for Internal-Combustion Engines end the like of which the following is a specification reference being had to the accompanying drawings, forming a part thereof.

The purpose of this invention is to provide an im roved construction of a vacuum fuel feed evice having certain advantages over the devices of this type now in use. It consists in the elements and features of construction shown and described, as indicated inthe claims.

In the drawings:-

Figure 1 is a section at the line, 1 1, on Fi re 2.

igure 2 is a. partial top plan view of a tank equipped with devices embodying this invention.

Figure 3 is a section at the line, 3-3, on Fi re 2. f

igure 4 is a detail section at the same lane .as Figure 2, showing a detail modication.

'lhe structure shown in the drawingecomprises a so-called vacuum tank having a receiving or vacuum chamber, A, and a, delivery or storage chamber, B, for the liquid fuel. The receiving chamber has the usual connection shown at D, for supplyin liquid from a lower source, not shown. It as also a connection shown at E leading to a source of vacuum as the-engine manifold or suction-producin device of any sort, not shown. At there is an atmosphere inlet to the receiving chamber.

Float-operated valve devices alternate the dominance of suction and ressiire (usually atmospheric) in the cham r A, iis illustrated ina conventional or similiar form by the tioiit, l suction valve, 2, atmosphere valve, 3, and lever snap action, 4, in Figure 2.-

The liquid is delivered from the receiving chamber to the delivery or storage chamber past a one-wa seating valve, G, which opens with the out ow from the receiving cha. m-

1 ber to the delive chamber, and is adapted to be seated by t e suction producing partial vacuum in the receiving chamber. In till these respects the construction is in general in accordance with the familiar type of these devices. The novel feature constit-iiting the invention herein claimed consists in a. communication lending buck from thel delivery chamber intothe receiving chamber which, as shown. is by way of a pipe, H, which is intruded liquid-tight through the diaphragm, a, which, separates the chambers. A. and B, opening in the chamber, B, said pipe extending up close alongside the wall of the chamber, A, the passage which it affords being continued in the cap, X, in which all the other connections with the upper chamber are formed, said duct openin through the lower side of seid cap into 'sai upper or receiving chamber. This passage comprises intermediate its ends a valve chamber, J, into which both the portions, i and k1, of said duct open through ports whose margins constitute valve seats; and in said chamber there is located a. valve, K, which'seats by one und the same movement atboth 'said ports, operating as a check valve at both its seatings and adapted to be opened bypi'essure in either direction,- that is, through the passage, It, or through the passage, l, and to be seated by suction in either direction', to-wit, operating throu h the passage, h, or through the passage, The result is that notwithstanding the suction from the receiving or vacuum chamber, and pressure from the delivery or storage chamber both tend to produce movement through the passage in the same direction, the suction will seat the valve, while the ressure will open it. By this means there is provided op ortunity for expansion of the liquid in the oliver)r chmber,-or of con- 'tiiiuous li uid inboth chambers when the 95 1.181.', nevertheless it cannot be drawn from the lower to the upper chamber by the suction operating in the u per chamber.

In the forni shown in igures 2 and 3, the valve is u fiat dish und .the two ports in the chamber, J, open through the sinne flat seat, TlliS iS in some respects and for somo reasons n, preferred form. In Figure 4, however, there is shown a modified form which has certain advantages In this form the vulve is a ball valve seating in a spherirally con cave seat through which both the ports open, the valve chamber being in generall tiesto conical upward from said spherical sect so that the valve in all cases tends to roll into the spherical sent hy gravity, and to seat at both ports at once, as in thel oase of the flat disk valve. Obviously other forms ot' valve device may he. employed, provided always the valve device. is sur-h with respect to the ort, that the same action of the valve opens iioth ports.

In order to permit delivery of the liquid` fuel from the lower or delivery chamber to the carburetor h v gravity, it is of course necessary that, there should be m1 atznospl'iere vent or access for atmospheric pressure to 4the delivery chamber. lt is ronvenirut and economical to utilize the pipe, il, for this purpose; and this ism'complishrd hlv providing in the cap' plate, X. uml :itniosplure inlet ducts, l, l, opening into the duct. Il,

anterior to the vulve chamber, l. and rahsent, 30, said duct having horn-ren (hr portions, Zand Z, a. small valve chamber, 2. for n hal' vulve, I", which seats hir gravity in the upiva-rdlypl'ien end of the portion, l', of

the duct, so as to be opened by the inlet of air to seat against the outward movement of air through said atmosphere inlet.

I claim 1. In a, vacuum feed device, in combination with a receiving chamber having a fuel supply connection, and means for alternating the dominance ot suction and pressure in said chamber, a delivery chamber and a valve-controlled passage for liquid from the first chamber to the second; an additional passage from the delivery chamber back to thev receiving chamber, said additional passage comprising.;v a valve chan'iber having two ports leading respectively to the receiving and delivery chamber, and a valve device seating to close said two ports by one and the same action of said valve device.

2. ln the construction defined in claim l, 'loregoing, the valve device being a unitary device which seats at both ports at once, and is opened by pressure and closed by Suction through either port.

3. In the construction defined in claim 1, foregoing, an. air inlet passage to the delivery chumher lending into said additional or svrond mentioned passage between said valve device nud .said delivery chamber, and a one-wav seating-valve in said air inlet p-assage opeuinp` in ward and seating against outward morexneut through said nir inlet passage. A

In trsl'imouy whereof, I have hereunto set my hond at Chicago. illinois, this` 17th day of March, 1922.

CHA RLES S. BURTON. 

